世界第八奇迹的最新秘密秦俑博物馆二号坑中出土的青铜剑，长度为８６厘米．剑身上共有８个棱面，科技人员用精度为０．２毫米的游标卡对它测量，发现这８个棱面极为对称均衡，每个棱面之间的误差都不到１０丝。目前这里一共出土了１９把青铜剑，每一把剑的校面误差，毫无... The latest secret of the eighth wonder of the world The bronze sword unearthed in Pit No.2 of the Museum of Terracotta Warriors and Horses, 86 cm in length. A total of eight facets on the sword body, science and technology personnel with a precision of 0.2 mm cursor card measured it and found that the eight facets are extremely symmetrical, each of the error between the facets are less than 10 wire. At present, a total of 19 bronze unearthed here, each of the school’s surface error, no ...